Automotive electric power supply assembly

• US 6,555,992 B2
• Filed: 09/24/2001
• Issued: 04/29/2003
• Est. Priority Date: 01/22/2001
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Asao, Yoshihito, Adachi, Katsumi
• Primary Examiner(s): Ponomarenko, Nicholas
• Application Number:
  US09/960,346
• Publication Number:
  US 20020097027A1
• Time in Patent Office: 582 Days
• Field of Search: 322/22, 322/23, 322/24, 322/28, 322/44, 322/46, 322/89, 322/90
• US Class Current: 322/28
• CPC Class Codes: H02P 2101/45 for motor vehicles, e.g. car alternators
• CPC Class Codes: H02P 9/307 more than one voltage output

Abstract

A three-phase alternating-current winding is constructed by forming winding phase portions into a Y connection. The winding phase portions are divided into first and second winding divisions. Outputs from the first winding divisions are rectified and output by a first rectifier, and outputs from the second winding divisions are rectified and output by a second rectifier. In addition, a magnetizing electric current supplied to a field winding is adjusted by a voltage regulator such that the output from the second rectifier becomes constant.

Claims

1. An automotive electric power supply assembly comprising:

a rotor provided with a field winding, said rotor forming a rotating magnetic field when a magnetizing electric current is supplied to said field winding;

a stator provided with at least one three-phase alternating-current winding constructed by forming three winding phase portions into a Y-connection, said stator being disposed so as to envelop said rotor and to generate an output when said rotating magnetic field is applied thereto; and

a voltage regulating means for adjusting said output from said stator by controlling said magnetizing electric current supplied to said field winding,

wherein each of said winding phase portions constituting said three-phase alternating-current winding is divided into a plurality of winding divisions, and

outputs from said winding divisions are simultaneously extracted independently and supplied to different electrical loads.

2. The automotive electric power supply assembly according to claim 1 wherein each of said winding phase portions is divided into first and second winding divisions.

3. The automotive electric power supply assembly according to claim 2 wherein said outputs from said first winding divisions are adjusted so as to be constant by said voltage regulating means, said outputs from said second winding divisions being controlled so as to be constant by a voltage division ratio based on the number of turns in said winding divisions.

4. The automotive electric power supply assembly according to claim 3 wherein said first winding divisions are winding divisions on a low-voltage side.

5. The automotive electric power supply assembly according to claim 2 wherein said first and second winding divisions are provided with an identical number of turns.

6. The automotive electric power supply assembly according to claim 1 wherein said outputs from said winding divisions are each subjected to full-wave rectification by an independent rectifier.

7. The automotive electric power supply assembly according to claim 6 wherein each of said winding phase portions is divided into first and second winding divisions.

8. The automotive electric power supply assembly according to claim 7 wherein said outputs from said first winding divisions are adjusted so as to be constant by said voltage regulating means, said outputs from said second winding divisions being controlled so as to be constant by a voltage division ratio based on the number of turns in said winding divisions.

9. The automotive electric power supply assembly according to claim 8 wherein said first winding divisions are winding divisions on a low-voltage side.

10. The automotive electric power supply assembly according to claim 7 wherein said first and second winding divisions are provided with an identical number of turns.

11. The automotive electric power supply assembly according to claim 1 wherein said stator is provided with a stator core in which slots are formed at a ratio of two per phase per pole, said slots forming six slot groups each constituted by said slots at intervals of six slots,

said winding phase portions are constructed by connecting in series winding sub-portions installed in adjacent pairs of said slot groups, and

said three-phase alternating-current winding is constructed by forming said winding phase portions into a Y connection.

12. The automotive electric power supply assembly according to claim 1 wherein said stator is provided with a stator core in which slots are formed at a ratio of two per phase per pole, said slots forming six slot groups each constituted by said slots at intervals of six slots,

said winding phase portions are constituted by winding sub-portions installed in each of said six slot groups,

two equivalent three-phase alternating-current windings each is constructed by forming three of said winding phase portions into a Y connection, and

said winding divisions constituting said winding phase portions constituting identical phases of said two three-phase alternating-current windings are connected in parallel.